Hello, Codeforces!

I am really excited to invite you to Codeforces Round 763 (Div. 2) on Dec/28/2021 16:35 (Moscow time)! The start time is unusual, so please pay attention.

All the problems were authored and prepared by me. I would like to give special thanks to everyone who made this round possible:

• KAN for excellent coordination with a lot of valuable advice!
• KAN again for translation of statements!
• tdpencil, Stepavly, Supermagzzz, minhcool, snowysecret, generic_placeholder_name, QuangBuiCPP, thenymphsofdelphi, PurpleCrayon, xuanquang1999, vinfat, hieplpvip, tourist, Lihwy, flamestorm for testing and valuable feedback!
• MikeMirzayanov for great Codeforces and Polygon platforms!
• You, for participating!

The round consists of 5 problems and you have 2 hours to solve them.

Wish you good luck and high ratings!

UPD0: The score distribution 500 — 1000 — 1750 — 2500 — 2750.

UPD1: Congratulation to the winners of the round!

Div. 2

1. wanyuezaifengli
2. ZhuJianfeng
3. proton1126
4. qazsxdew
5. Hayasaka

Div. 1 + 2

1. heno239
2. Geothermal
3. Vercingetorix
4. dorijanlendvaj
5. wanyuezaifengli

UPD2: The Editorial is out!

Hope that you guys enjoy the rounds, and thank you again for participating! <3